Crossword clues for Black substance. 4 letters:SOOTBlack substance.TARSBlack paving substancesDARKWith 60-Across, hypothetical substance in outer space ... and a literal hint to six black squares in this puzzleINKBlack substance.TARBlack substance.TARSticky black substanceSOOTSBlack substances, essentially of carbon.TARThick, black, gooey substanceTARBlack pit substance
